* {
  margin: 0;
  padding: 0;
}
html,body {
  width: 100%;
  height: 100%;
  font-size: 24px;
  font-family: 'Microsoft YaHei';
  //font-weight: 100;
  overflow: hidden;
}

body {
  background-image: url("../images/background.png");
  background-size: cover;
  color: #fff;
  //-webkit-text-size-adjust:none;
}

.flex-row-center {
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
  align-items: center;
}

.flex-column-center {
  display: flex;
  flex-flow: column nowrap;
  justify-content: center;
  align-items: center;
}

.flex-center {
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
  align-items: center;
}

.flex-row-between {
  display: flex;
  flex-flow: row nowrap;
  justify-content: space-between;
  align-items: center;
}